A stone is thrown vertically upwards and the height$\ x$ ft reached by the stone in t seconds is given by $x = 80t - 16t^{2}.\$The stone reaches the maximum height in

Question

Dr. Abubacker · Accepted Answer

(b)
Given, $x = 80t - 16t^{2}$
$\Rightarrow \ \ \ \ \ \ \ \ \ \ \ \ \ \frac{dx}{dt} = 80 - 32t$
At maximum height$\frac{dx}{dt} = 0$
$	herefore\ \ \ t = 25s$

Q. A stone is thrown vertically upwards and the height$\ x$ ft reached by the stone in t seconds is given by $x = 80t - 16t^{2}.\$The stone reaches the maximum height in

Explanation

Reviewed by Dr. Abubacker

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